WPF应用程序的切入点是什么？ [英] What is the entry point of a WPF application?

问题描述

Main 方法是C＃控制台应用程序的入口点。因此，例如，如果必须启动一些线程或服务，则可以在 Main 方法中进行操作。

The Main method is the entry point of a C# console application. Thus, for example, if I have to start some threads or services, I will do it within the Main method.

我在WPF项目中看不到 Main 方法，那么WPF应用程序的入口是什么？如果我必须启动一些线程或服务，应该在哪里编写启动它们的代码？

I do not see the Main method inside a WPF project, so what is the entry point of a WPF application? If I have to start some threads or services, where should write the code for starting them?

更新： 此答案总结了可用的解决方案，但是每种解决方案的优缺点是什么？

UPDATE: this answer summarizes the available solutions, but what are the pros and cons of each solution?

推荐答案

您的主要入口点是App.Xaml背后的代码中的OnStartup覆盖：

Your main entry point is an override of OnStartup in the code-behind of App.Xaml :

public partial class App : Application
{
    protected override void OnStartup(StartupEventArgs e)
    {
        base.OnStartup(e);
        // here you take control
    }
}

其他兴趣点可能是Application.OnActivate（）以及MainWindow的Loaded和Initialized事件。

Other points of interest might be Application.OnActivate() and the Loaded and Initialized events of your MainWindow.

如果我必须启动一些线程或服务，应该在哪里编写启动它们的代码？

If I have to start some threads or services, where should write the code for starting them?

取决于这些线程/服务的需求和需求。

Depends on what those threads/services need and want.

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